Two famous Nepalese Sherpas are preparing to hike the entire length of the Great Himalaya Trail in an effort to raise awareness of the effects of climate change on the region. The duo will set out on January 15th and hope to encourage economic development along the new trekking route as well.

Apa Sherpa and Dawa Steven Sherpa will begin their journey in eastern Nepal in the village of Ghunsa and will travel 1056 miles west until they reach the town of Darchula. The entire hike is expected to take roughly 120 days to complete, passing through 20 different districts along the way.

While the GHT is an impressively long trek, it is the altitude that presents the biggest challenge for most hikers. It is considered the highest long distance trail in the world, rising above 18,880 feet at its tallest point. That altitude isn’t likely to be a problem for these two men however, as they have both climbed Everest multiple times. In fact, Apa holds the record for most successful summits, having scaled the highest mountain on the planet 21 times. Dawa Steven has stood on the summit of the mountain twice as well, giving the men plenty of experience at high altitude.

In addition to the altitude, the GHT is known for its incredibly scenic vistas as well. The Himalayan Mountains make a breathtaking backdrop for the trek, but climate change is having a dramatic impact on that place. As the planet has warmed, the glaciers throughout the region have gone into retreat, severely limiting the amount of fresh water that is available to the people who live there. Even now, many of those people have to walk several hours each day just to collect water for their daily use. The two Sherpas hope to spread the news on this impending crisis in their home country.

Climate change isn’t their only priority however, as they hope to encourage economic development along the Great Himalaya Trail as well. The route opened earlier this year, and while hikers have begun walking the route, the infrastructure to support them is not fully in place yet. Apa and Dawa Steven hope that their hike will help bring attention to the trail that will also inspire new restaurants and inns to open along its length, making it easier for adventure travelers to undertake the long distance trek.